2020-10-31 22:34:08 +00:00
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use crate::{comp::Body, sync::Uid};
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use serde::{Deserialize, Serialize};
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use specs::{Component, FlaggedStorage};
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use specs_idvs::IdvStorage;
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/// Specifies what and how much changed current health
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#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
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pub struct HealthChange {
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pub amount: i32,
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pub cause: HealthSource,
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}
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#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
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pub enum HealthSource {
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Attack { by: Uid }, // TODO: Implement weapon
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Projectile { owner: Option<Uid> },
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Explosion { owner: Option<Uid> },
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Energy { owner: Option<Uid> },
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Buff { owner: Option<Uid> },
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Suicide,
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World,
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Revive,
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Command,
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LevelUp,
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Item,
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Healing { by: Option<Uid> },
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Unknown,
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}
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#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
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pub struct Health {
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base_max: u32,
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current: u32,
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maximum: u32,
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pub last_change: (f64, HealthChange),
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pub is_dead: bool,
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}
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impl Health {
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pub fn new(body: Body, level: u32) -> Self {
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let mut health = Health::empty();
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health.update_max_hp(Some(body), level);
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health.set_to(health.maximum(), HealthSource::Revive);
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health
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}
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pub fn empty() -> Self {
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Health {
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current: 0,
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maximum: 0,
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base_max: 0,
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last_change: (0.0, HealthChange {
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amount: 0,
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cause: HealthSource::Revive,
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}),
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is_dead: false,
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}
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}
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pub fn current(&self) -> u32 { self.current }
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pub fn maximum(&self) -> u32 { self.maximum }
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pub fn set_to(&mut self, amount: u32, cause: HealthSource) {
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let amount = amount.min(self.maximum);
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self.last_change = (0.0, HealthChange {
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amount: amount as i32 - self.current as i32,
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cause,
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});
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self.current = amount;
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}
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pub fn change_by(&mut self, change: HealthChange) {
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self.current = ((self.current as i32 + change.amount).max(0) as u32).min(self.maximum);
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self.last_change = (0.0, change);
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}
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// This function changes the modified max health value, not the base health
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// value. The modified health value takes into account buffs and other temporary
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// changes to max health.
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pub fn set_maximum(&mut self, amount: u32) {
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self.maximum = amount;
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self.current = self.current.min(self.maximum);
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}
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// This is private because max hp is based on the level
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fn set_base_max(&mut self, amount: u32) {
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self.base_max = amount;
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self.current = self.current.min(self.maximum);
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}
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pub fn reset_max(&mut self) { self.maximum = self.base_max; }
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pub fn should_die(&self) -> bool { self.current == 0 }
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pub fn revive(&mut self) {
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self.set_to(self.maximum(), HealthSource::Revive);
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self.is_dead = false;
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}
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// TODO: Delete this once stat points will be a thing
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pub fn update_max_hp(&mut self, body: Option<Body>, level: u32) {
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if let Some(body) = body {
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self.set_base_max(body.base_health() + body.base_health_increase() * level);
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self.set_maximum(body.base_health() + body.base_health_increase() * level);
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}
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}
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pub fn with_max_health(mut self, amount: u32) -> Self {
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self.maximum = amount;
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self.current = amount;
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self
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}
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}
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impl Component for Health {
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type Storage = FlaggedStorage<Self, IdvStorage<Self>>;
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}
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#[derive(Copy, Clone, Debug, Serialize, Deserialize)]
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2020-11-01 17:15:46 +00:00
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pub struct Dead {
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2020-10-31 22:34:08 +00:00
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pub cause: HealthSource,
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}
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2020-11-01 17:15:46 +00:00
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impl Component for Dead {
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2020-10-31 22:34:08 +00:00
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type Storage = IdvStorage<Self>;
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}
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